iOSDC Japan 2022
CfP: https://fortee.jp/iosdc-japan-2022/proposal/397d52a7-8f62-4c40-8392-2dc081227189
YouTube Archive (TBA)
Swift Concurrency࣌ͷ ϦΞΫςΟϒϓϩάϥϛϯάͷجૅཧղiOSDC Japan 2022גࣜձࣾZOZOςοΫϦʔυΜ͡ΎΜ! / @banjunCopyright © ZOZO, Inc.
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© ZOZO, Inc.2גࣜձࣾZOZOςοΫϦʔυZOZOTOWN iOSΜ͡ΎΜ! / @banjun-PWF-JWFS NBD04$SFBUF-JWF1IPUPTGSPN.PWJFT'MJDL4,, J04+BQBOFTF$VTUPN,FZCPBSE&YUFOTJPOݸਓϓϩδΣΫτɾ1PEDBTU͖ͷ͜ΔΤϑΤϜX!USFCZ͖ͷ͜Δ
© ZOZO, Inc.https://zozo.jp/3● ϑΝογϣϯEC● 1,500Ҏ্ͷγϣοϓɺ8,500Ҏ্ͷϒϥϯυͷऔΓѻ͍● ৗ࣌90ສҎ্ͷΞΠςϜͱຖฏۉ2,600Ҏ্ͷ৽ண Λܝࡌʢ20226݄࣌ʣ● ϒϥϯυݹணͷϑΝογϣϯκʔϯʮZOZOUSEDʯίεϝઐϞʔϧʮZOZOCOSMEʯɺۺͷઐϞʔϧʮZOZOSHOESʯɺϥάδϡΞϦʔˍσβΠφʔζκʔϯʮZOZOVILLAʯΛల։● ଈૹαʔϏε● ΪϑτϥοϐϯάαʔϏε● πέ͍ ͳͲ
© ZOZO, Inc.
جૅγϦʔζΑ͏ͦ͜
© ZOZO, Inc.6جૅγϦʔζΑ͏ͦ͜ʮجૅʯͬͯ"ͳΜ͔؆୯ͦ͏ͩ͠ྑͦ͞͏#ͳΜ͔ාͦ͏
© ZOZO, Inc.7جૅγϦʔζΑ͏ͦ͜;0;0ͰʮجૅʯʮΑ͘Θ͔ΔʯγϦʔζͷࣾษڧձΛͬͯ·͢$ϓϩμΫτͷण໋ϥΠϒϥϦύϥμΠϜͷण໋ΑΓ͍%ৗʹਖ਼ղͷʮٕज़બఆʯ͕͋ΔΘ͚͡Όͳ͍
جૅԠ༻ Ԡ༻ Ԡ༻ Ԡ༻
Ԡ༻ Ԡ༻ Ԡ༻ Ԡ༻جૅجૅجૅجૅجૅجૅجૅجૅجૅ جૅ
جૅجૅجૅجૅجૅجૅجૅجૅجૅ جૅԠ༻ Ԡ༻ Ԡ༻ Ԡ༻
ࠓϦΞΫςΟϒϓϩάϥϛϯά(RP)ͱSwift Concurrency
© ZOZO, Inc.12࣌എܠͱղܾ͍ͨ͠՝4XJGUͰJ04ΞϓϦΛॻ͚ΔΑ͏ʹͳͬͨઃܭύλʔϯ͕ྲྀߦΓɺ31 ϦΞΫςΟϒϓϩάϥϛϯάྲྀߦͬͨ4XJGU6*ͱ$PNCJOF͕ग़ͨ4XJGU$PODVSSFODZ͕ग़ͨΘͨͨͪ͠Ͳ͔͍͍͑͜ͷ͔ʁ
© ZOZO, Inc.13ϦΞΫςΟϒϓϩάϥϛϯά(RP)ͱ Swift Concurrency4XJGU$PODVSSFODZϦΞΫςΟϒϓϩάϥϛϯάඇಉظϓϩάϥϛϯάσʔλετϦʔϜϥΠϒϥϦͰ͋ΔݴޠͰ͋Δʮ͍ΘΏΔRPʯΛ࣮ݱ͍ͨ͠ฒߦॲཧΛ࣮ݱ͍ͨ͠ڞ௨
© ZOZO, Inc.14ʮ͍ΘΏΔRPʯ ※͝ҙ31ͷࢦ͢ͷॾઆ͋ΔͷͰɺ͜ͷεϥΠυͰɺΈͳ͞Μ͕J04ΞϓϦΛ࡞Δͷʹ͏Α͏ͳͷΛʮ͍ΘΏΔ31ʯ·ͨ୯ʹʮ31ʯͱݴ͍·͢ɻ͍ΘΏΔRPϦΞΫςΟϒϓϩάϥϛϯά (ҰൠͷRPؚΉ)FRP ଞͷRPFunctionalReactiveProgrammingiOSΞϓϦΛ࡞Δͱ͖ʹ͏RPαʔόαΠυΫϥυͱ͔
© ZOZO, Inc.15ʮ͍ΘΏΔRPʯ ※͝ҙ͍ΘΏΔ31Ͱɺ6*͕ͦ͜31Λ͏ཧ༝ͷத৺ͱͳΔͱ͍͏ಛ͕͋Δ͜ΕΒΛܨ͙&6*&ωοτϫʔΫ&ଞʹɺηϯαʔɾΧϝϥɾपลػثͳͲͳͲ
RPͱपลͷؔ࿈ͷཧ&ݱঢ়ͱաڈͷ͢Γ͋Θͤ
© ZOZO, Inc.17RPؔ࿈ਤ ......ྩ4࠷৽൛(งғؾ)struct, class, var, didSet, closure, property wrapper, …Swiftجຊػೳasync/await, AsyncStream, …Swift Concurrencyswift-async-algorithms, AsyncChannel, …ඇಉظϓϩάϥϛϯάReactiveSwiftRxSwiftCombine+ UIͷΞμϓλRPϥΠϒϥϦ·ͩͳ͍?RPϥΠϒϥϦ (iOSΞϓϦ͚)RP (Ұൠ)͍ΘΏΔϦΞΫςΟϒϓϩάϥϛϯάRP (iOSΞϓϦ)
© ZOZO, Inc.18RPؔ࿈ਤ ......Swift ConcurrencyҎલstruct, class, var, didSet, closure, property wrapper, …SwiftجຊػೳඇಉظϓϩάϥϛϯάReactiveSwift, RxSwift, Combine + UIͷΞμϓλRPϥΠϒϥϦRP (iOSΞϓϦ)RPϥΠϒϥϦΛඇಉظ༻్Ͱ͍ͬͯΔέʔεͨͩͷඇಉظcompletion handlerͱ͔͍ΘΏΔϦΞΫςΟϒϓϩάϥϛϯάMVVMͷܨ͗ͱ͔completionͱdidSetͰܨ͍ͰٛͷRP͔...?
© ZOZO, Inc.19RPؔ࿈ਤ ......Swift ConcurrencyҎ߱Ͳ͏ม͑Δ͔struct, class, var, didSet, closure, property wrapper, …Swiftجຊػೳasync/await, AsyncStream, …Swift ConcurrencyඇಉظϓϩάϥϛϯάReactiveSwift, RxSwift, Combine+ UIͷΞμϓλRPϥΠϒϥϦRP (iOSΞϓϦ)RPϥΠϒϥϦΛඇಉظ༻్Ͱ͍ͬͯΔέʔεͨͩͷඇಉظ͍ΘΏΔϦΞΫςΟϒϓϩάϥϛϯάMVVMͷܨ͗ͱ͔async/awaitͱdidSetͰܨ͍ͰٛͷRP͔...?Swift ConcurrencyΛͬͨ΄͏͕ྑͦ͞͏ͦͷ··RPϥΠϒϥϦΛ͏ͱྑͦ͞͏
© ZOZO, Inc.20struct, class, var, didSet, closure, property wrapper, …Swiftجຊػೳasync/await, AsyncStream, …Swift ConcurrencyඇಉظϓϩάϥϛϯάReactiveSwift, RxSwift, Combine+ UIͷΞμϓλRPϥΠϒϥϦRP (iOSΞϓϦ)RPϥΠϒϥϦΛඇಉظ༻్Ͱ͍ͬͯΔέʔεͨͩͷඇಉظ͍ΘΏΔϦΞΫςΟϒϓϩάϥϛϯάMVVMͷܨ͗ͱ͔async/awaitͱdidSetͰܨ͍ͰٛͷRP͔...?Swift ConcurrencyΛͬͨ΄͏͕ྑͦ͞͏ͦͷ··RPϥΠϒϥϦΛ͏ͱྑͦ͞͏͍ΘΏΔRPͷ෦
UIͱσʔλϑϩʔ
© ZOZO, Inc.22σʔλϑϩʔ31Ͱ6*ΛؚΉσʔλϑϩʔΛ੩తʹهड़͢Δͷ͕తྫӈͷؔΛ੩తʹهड़͍ͨ͠31ͷͳ͍4XJGUͰɺʮ͜ΕΛ࠶ܭࢉ͢Δʯ໋ྩจ͕ඞཁ ੩తʹॻ͚ͳ͍͜ͷྫ: https://reactivecocoa.io/philosophy.htmlin inoutA = B + Cvar a: Intvar b: Int { didSet { a = b + c } }var c: Int { didSet { a = b + c } }
© ZOZO, Inc.23໋ྩతͱ͔એݴతͱ͔એݴతͷྨٛޠ੩తͦΕͬΆ͍ྫ"VUP-BZPVU$PEBCMFͰ"1*ϦΞΫςΟϒϓϩάϥϛϯά໋ྩతͷྨٛޠಈతɾखଓతͦΕͬΆ͍ྫखಈϨΠΞτv.frame = ...ࣙॻऔΓग़͠Ͱ"1*d["id"] = 42खͰσʔλߋ৽updateState(); updateUI()
© ZOZO, Inc.એݴతͷྨٛޠ੩తͦΕͬΆ͍ྫ"VUP-BZPVU$PEBCMFͰ"1*ϦΞΫςΟϒϓϩάϥϛϯά໋ྩతͷྨٛޠಈతɾखଓతͦΕͬΆ͍ྫखಈϨΠΞτv.frame = ...ࣙॻऔΓग़͠Ͱ"1*d["id"] = 42खͰσʔλߋ৽updateState(); updateUI()24ઐಛԽ࣭Αͦ͞͏ͦΕͧΕษڧ͠ͳ͍ͱग़དྷͳ͍͠͠ʮΉ͍ͣʯͱ͞ΕΔ͍ͭͰྗٕͰॻ͚Δॲཧൈ͚Ͱෆ۩߹ग़ͦ͏ଞͷݴޠ͔͠Βͳͯ͘ษڧ͠ͳͯ͘ͳΜͱ͔ॻ͚ͦ͏ʮ༷ɾઃܭʯʹ͍ۙهड़ʮ༷ɾઃܭʯΛ໋ྩʹ༁͢Δ͍͔ʹͳϓϩάϥϛϯάͷ͓͠͝ͱ໋ྩతͱ͔એݴతͱ͔
© ZOZO, Inc.એݴతͷྨٛޠ੩తͦΕͬΆ͍ྫ"VUP-BZPVU$PEBCMFͰ"1*ϦΞΫςΟϒϓϩάϥϛϯά໋ྩతͷྨٛޠಈతɾखଓతͦΕͬΆ͍ྫखಈϨΠΞτv.frame = ...ࣙॻऔΓग़͠Ͱ"1*d["id"] = 42खͰσʔλߋ৽updateState(); updateUI()25ઐಛԽ࣭Αͦ͞͏ͦΕͧΕษڧ͠ͳ͍ͱग़དྷͳ͍͠͠ʮΉ͍ͣʯͱ͞ΕΔ͍ͭͰྗٕͰॻ͚Δॲཧൈ͚Ͱෆ۩߹ग़ͦ͏ଞͷݴޠ͔͠Βͳͯ͘ษڧ͠ͳͯ͘ͳΜͱ͔ॻ͚ͦ͏ʮ༷ɾઃܭʯʹ͍ۙهड़ʮ༷ɾઃܭʯΛ໋ྩʹ༁͢Δ͍͔ʹͳϓϩάϥϛϯάͷ͓͠͝ͱ໋ྩతͱ͔એݴతͱ͔
© ZOZO, Inc.એݴతͷྨٛޠ੩తͦΕͬΆ͍ྫ"VUP-BZPVU$PEBCMFͰ"1*ϦΞΫςΟϒϓϩάϥϛϯά໋ྩతͷྨٛޠಈతɾखଓతͦΕͬΆ͍ྫखಈϨΠΞτv.frame = ...ࣙॻऔΓग़͠Ͱ"1*d["id"] = 42खͰσʔλߋ৽updateState(); updateUI()26ઐಛԽ࣭Αͦ͞͏ͦΕͧΕษڧ͠ͳ͍ͱग़དྷͳ͍͠͠ʮΉ͍ͣʯͱ͞ΕΔ͍ͭͰྗٕͰॻ͚Δॲཧൈ͚Ͱෆ۩߹ग़ͦ͏ଞͷݴޠ͔͠Βͳͯ͘ษڧ͠ͳͯ͘ͳΜͱ͔ॻ͚ͦ͏ʮ༷ɾઃܭʯʹ͍ۙهड़ʮ༷ɾઃܭʯΛ໋ྩʹ༁͢Δ͍͔ʹͳϓϩάϥϛϯάͷ͓͠͝ͱ໋ྩతͱ͔એݴతͱ͔
© ZOZO, Inc.એݴతͷྨٛޠ੩తͦΕͬΆ͍ྫ"VUP-BZPVU$PEBCMFͰ"1*ϦΞΫςΟϒϓϩάϥϛϯά໋ྩతͷྨٛޠಈతɾखଓతͦΕͬΆ͍ྫखಈϨΠΞτv.frame = ...ࣙॻऔΓग़͠Ͱ"1*d["id"] = 42खͰσʔλߋ৽updateState(); updateUI()27ઐಛԽ࣭Αͦ͞͏ͦΕͧΕษڧ͠ͳ͍ͱग़དྷͳ͍͠͠ʮΉ͍ͣʯͱ͞ΕΔ͍ͭͰྗٕͰॻ͚Δॲཧൈ͚Ͱෆ۩߹ग़ͦ͏ଞͷݴޠ͔͠Βͳͯ͘ษڧ͠ͳͯ͘ͳΜͱ͔ॻ͚ͦ͏ʮ༷ɾઃܭʯʹ͍ۙهड़ʮ༷ɾઃܭʯΛ໋ྩʹ༁͢Δ͍͔ʹͳϓϩάϥϛϯάͷ͓͠͝ͱ໋ྩతͱ͔એݴతͱ͔
© ZOZO, Inc.28σʔλϑϩʔA = B + CCBA +in inoutͪͳΈʹσʔλϑϩʔͷਤͱ͍͏ͱԼͷΑ͏ͳײ͜͡ͷྫ: https://reactivecocoa.io/philosophy.html
© ZOZO, Inc.29σʔλͷശ + ଓͷҹCBA +ʮมͱശͰ͋ΔʯശΛܨ͍ͩͷ͕σʔλϑϩʔͰ͋Γ31ͨͩ͠σʔλϑϩʔͷശɺมߋͷػೳΛͭ͜ͱMutablePropertyBehaviorRelayCurrentValueSubject@Published֤ϥΠϒϥϦͰͷʮശʯ
© ZOZO, Inc.30σʔλͷശ + ଓͷҹCBA +mapflatMapfiltercombineLatest:ശͱശͷଓҹ ্ྲྀɾԼྲྀ͕͋ΔʮΦϖϨʔλʔʯͱݺΕΔ֤ϥΠϒϥϦͰͷʮҹʯ
© ZOZO, Inc.31σʔλͷശ + ଓͷҹଓͷҹඇಉظͰΑ͍ɻ࣌ؒతͳॲཧΛͯ͠Α͍ɻ෭࡞༻Λ࣮ߦͯ͠Α͍ɻ͜Ε͕31ϥΠϒϥϦͷ࣮Λ͏ͱศརͩͱΑ͘ݴΘΕΔ෦debouncethrottle:͍࣌ؒʹͨ͘͞ΜมԽͯ͠ճ͚ͩ͑Δɺͱ͔ ֤ϥΠϒϥϦͰɺ࣌ؒͰؒҾ͖͢Δʮҹʯ
© ZOZO, Inc.ཧ͖͢ঢ়ଶͲΕ͚ͩ͋Δ͔ ͦΕΛശʹ͢Δঢ়ଶ͕มΘͬͨͱ͖ɺശ͔Βശ͖͔͢ ͦΕΛҹʹ͢Δσʔλϑϩʔͷ֎͔ΒมߋͰ͖Δശ σʔλϑϩʔͷ֎Өڹ͢Δശ มߋ͕͋Δ͚ͩͰɺϝϯόมͷઃܭͱมΘΒͳ͍Ұ࣌มҰ࣌తͳശϝϯόʹ࣋ͨͳ͍͍ͯ͘32σʔλϑϩʔΛઃܭ͢Δ
© ZOZO, Inc.ߏతʹ֎ଆ͔ΒΈΔͱγϯϓϧʹΈ͑Δ33σʔλϑϩʔΛઃܭ͢Δ
© ZOZO, Inc.34UIͱͷଓ(ೖޱɾग़ޱ)*#"DUJPOͰड໋͚ͯྩతʹೖྗB.value = text6*ΞμϓλͰശ૬ͷͷ͕͋ΔB = fieldB.reactive.textValuesBA PCTFSWF TVCTDSJCF TJOL໋ͯ͠ྩతʹग़ྗlabelA.text = $06*ΞμϓλͰശ૬ͷͷ͕͋ΔlabelA.reactive.text <~ Aσʔλϑϩʔͷ֎ͱ໋ྩతʹΓͱΓ͢Δ͔ɺϥΠϒϥϦʹ༻ҙ͞Ε͍ͯΔ6*ΞμϓλΛͬͯσʔλϑϩʔͷҰ෦ͱͯ͠ଓ͢Δ
© ZOZO, Inc.APIϨεϙϯε ετϦʔϛϯά payload35UIҎ֎ͷೖޱɾग़ޱ6*ʹ͍݁ͯ͠ͳ͍ΠϕϯτΛೖޱग़ޱͱ͢Δ͜ͱ͋ΔηϯαʔݕࡧςΩετೖޱηϯαʔ J#FBDPOΛݕͨ͠ͱ͔ɺͳΜͰωοτϫʔΫݕࡧςΩετ͕มߋ͞ΕͨΒ"1*ϦΫΤετग़ޱ
© ZOZO, Inc.֤ϥΠϒϥϦͰͷʮശ૬ʯ36RPͰσʔλϑϩʔʹଓͰ͖ΔͦͷଞͷϞϊجຊతͳσʔλϑϩʔΛ֦ுͯ͠͞ΒʹߴʹͰ͖ΔϞϊ͕֤31ϥΠϒϥϦͰ༻ҙ͞Ε͍ͯΔલड़ͷʮശ૬ͷͷʯͳͲAPIϨεϙϯε ετϦʔϛϯάpayload ηϯαʔSignalSignalProducerObservablePublisher
Swift Concurrency͔?RP͔?
© ZOZO, Inc.38͍ΘΏΔඇಉظϓϩάϥϛϯάͷ෦ɺঃʑʹ4XJGU$PODVSSFODZʹ͍ͯ͘͠ͱγϯϓϧSwift Concurrency͔? RP͔?ඇಉظϓϩάϥϛϯάRPϥΠϒϥϦΛඇಉظ༻్Ͱ͍ͬͯΔέʔεͨͩͷඇಉظSwift ConcurrencyΛͬͨ΄͏͕ྑͦ͞͏σʔλϑϩʔͰܨ͗͜ΊΔͱ͜Ζɺ31Λ͏6*ωοτϫʔΫͱͷଓࠓޙඞཁ
© ZOZO, Inc.39RPؔ࿈ਤ ......࠶ܝʂ͓͞Β͍͠Α͏struct, class, var, didSet, closure, property wrapper, …Swiftجຊػೳasync/await, AsyncStream, …Swift ConcurrencyඇಉظϓϩάϥϛϯάReactiveSwift, RxSwift, Combine+ UIͷΞμϓλRPϥΠϒϥϦRP (iOSΞϓϦ)RPϥΠϒϥϦΛඇಉظ༻్Ͱ͍ͬͯΔέʔεͨͩͷඇಉظ͍ΘΏΔϦΞΫςΟϒϓϩάϥϛϯάMVVMͷܨ͗ͱ͔async/awaitͱdidSetͰܨ͍ͰٛͷRP͔...?Swift ConcurrencyΛͬͨ΄͏͕ྑͦ͞͏ͦͷ··RPϥΠϒϥϦΛ͏ͱྑͦ͞͏
© ZOZO, Inc.40͍ΘΏΔඇಉظϓϩάϥϛϯάͱݴ͍ͬͯΔ͕ྫ͑͜͏͍͏ͱ͜Ζ"1*ίʔϧݸҰ࿈ͷBTZODGVODΛϩʔΧϧͰ·ͱΊ͍ͨSwift Concurrency͔? RP͔?func f() async -> T {let a = await fa()let b = await fb(a)return b}func request() async -> Response
© ZOZO, Inc.4131Λ͏ͱ͜Ζɺঢ়ଶมԽ͕͋Γɺঢ়ଶΛܨ͍ͰσʔλϑϩʔΛઃܭͰ͖Δͱ͜Ζྫ͑͜͏͍͏ͱ͜ΖϩʔΧϧείʔϓΛӽ͑ͯ7$7.ͷϝϯόมͱͯ͠อ࣋͞ΕΔঢ়ଶ͕͋Γɺঢ়ଶؒʹ͕͋Δ ͍͔ͭ͘ͷঢ়ଶ6*ωοτϫʔΫʹΑΓมԽ͢ΔSwift Concurrency͔? RP͔?
͓ΘΓʹ
© ZOZO, Inc.43͜Μͳ;͏ʹཧղͯ͠Β͑ͯͨΒخ͍͠Ͱ͢ࢲ͕͖ͨͪͬͯͨʮ͍ΘΏΔ31ʯͷཱͪҐஔ͕Θ͔ͬͨʂͬͱͯͨ͠4XJGU$PODVSSFODZඇಉظͱ31ͱͷҧ͍͕ϋοΩϦͨ͠ʂجૅΛ͓͑͞Δ͜ͱͰɺܧଓతʹϓϩμΫτΛͤ͞Δྗʹ͠Α͏ͱࢥͬͨʂͬͱΓ͍ͨʂڭ͑ͯ΄͍͠ʂ
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